Power Generation and Plant Operation

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General layoutthermal power plant

Coal Handling Plant (CHP)

• Unloading:

• Conveying :

• Crushing:

Transportation of Coal

5 ways of Transportation.

• 1. Railways.

• 2. Ropeways.

• 3. Roadways.

• 4. waterways.

• 5. Airway.

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Coal Handling Plant (CHP)

• Unloading Plant:(Wagon Tipper)

• Conveying Plant:(It is used for conveying coal from unloading to the coal yard or directly to the bunker)

• Crushing Plant:

General Layout Of CHP

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Wagon Tippler(W/T) Crusher House

Bunkers

Tripper Trolley

Conv. Belts Vibrating

Screens

Crushers

Feeder Surge

Hopper

Hopper

CHP Auxiliaries7

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Operational Cycle

Bunkering Cycle

Stacking Cycle

Reclaiming Cycle

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Bunkering Cycle

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Bunkers

From W/T

Bunkering

Belts

Surge Hopper

Vibrating Feeder

Crusher House

Crusher

Stacking Cycle

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Bunkers

Stacking Belts

Crushed

Yard

From W/T

Crusher House

Bunkering

Belts

By-Passed Coal

Coal Is not required if bunker is full or Due any

maintenance

Reclaiming Cycle

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Bunkers

Reclaiming Belts

Crushed

Yard

Non-

Crushed

Yard

From W/T

Crusher House

Bunkering

Belts

If Outer Supply of coal Is Not Present

Stocked Coal

Wagon Tippler

• These are used to unload the coal wagons into coal hoppers in very less time (e.g. 20 wagons/hr. or more).

• Weighing of coal is carried out at wagon tippler.

• Normally 55-60 metric ton of coal come in each wagon.

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Conveyor Belt System

• Construction of Conveyor Belt

• Conveyor Belt Drive System

• Protection System

– Interlocking

– Magnetic Separator

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Conveyor Belt Drive System7

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Motor G / B

Fluid Coupling

Filled with 3/4th oil

Fusible plug Head End Pulley

Tail End Pulley

oSpeed before crusher 2.4 m/secoSpeed After Crusher 2.7 m/sec

Belt Speed

Protection System

• Interlocking is used for safety purpose.

• If any belt fails all other belts stop working which are interconnected.

• Magnetic Separator is used to remove metal particle from coal conveyed through conveyor belt for improving boiler efficiency.

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Crushing Mechanism In CHP

• Three Stage Crushing System is used in Plant.

– 1.Double Roll Crusher

– 2.Rotary Breaker Crusher

– 3.Impact Crusher

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W / T No.4

DRCR RBCR Impact

250 mm

80 mm

600 mm

20-25 mmStage 1 Stage 2

Stage 3

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